Service fuse

I have noticed after a visit from my electricity supplier - to fit a
service switch - that their fuse has been changed from a 100Amp one to
60Amp, and labelled as such. Anyone have any idea why this was done?
I fear that, on occasions, this may well not be sufficient. I also
notice that when fitting some types of showers - 8.5kW and above - that
the fuseboard should be rated at *above* 60Amps. Any advice, comments?

When I moved into my present house last November, it had a key pre-payment
meter fitted. I asked NPower to come and change it for a credit meter.
The chap came on the appropriate day and changed it. He also said, quote "I
have also changed the main service fuse from 100Amp to 60Amp".
I questioned his reasoning for doing this and he told me that it was to do
with the fuse carrier. Half open types have now only got to have a maximum
60Amp fuse in and fully closed carriers can have 100Amp fuse fitted.
Now, whether he was being truthful or not I have no idea, but has it is he
who does the job, I suspect he was right.

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